Stanton - A fire heavily damaged a mobile home on Dennis Road in the Park Place Mobile Home Park.  Firefighters were dispatched at 10:30 AM.  Deputy Fire Chief Joe Stewart was on the scene in less than two minutes and reported a working alarm. The fire raced through the home and caused heavy damage estimated at $50,000.   No one was home during the blaze and no firefighters were injured.  The fire was quickly brought under control.  The Delaware State Fire Marshal's Office indicated the fire originated in a bedroom mattress.   The home's occupants are staying with family members.  Mill Creek was assisted by Cranston Heights, Minquas and Belvedere Fire Companies.